Doorcheck



CARLSON DOORCHECK Filed Sept. 1932 2 Sheets-Sheet 1 I), I V

ll I

Oct. 17, 1933. s. A. CARLSON DOORCHECK Fil ed Sept. 1932 2 Sheets-Sheet 2 Patented Oct. 17, 1 933 g 1 UNITED. STATES; PAT NT" DOORCHEGKY Gustav A. Carlson, Chicago, Ill., assignorto The Boye Needle Company, Chicago, Ill.",- a corporation of Illinois 1 Application September 3, 1932. Serial No. 631,718

' "3 Claims. (01. 16--84) This invention relates to a door check. How- Secured to the inner end of the valve stem 21 ever, the invention is applicable to other uses is an'air-tight'head'22 which may beof any 'suitand, while theinvention is described herein in able construction;v l i. r 1 connection with a door, itwill be understood'that If desired, the tube 1'7 may be. provided with 5' the invention. may be used in conjunction with a'checkvalve'of anysuitableconstruction. :As 0.-

other types of closures. shown more clearly in Figsfl and 3, a metal disk An object of the invention is to provide im- 23'is secured within the 'inner'end of tube 17 proved means for cushioning the closing of a door byineans of the split springl24. The disk 23 or the like and means for automatically resetis cut away along its central portion to pro-,

10 ting the cushioning apparatus every time that the vide a resilient arm which carries a valve door is opened. The invention is particularly usedisk 26. The closure disk 26 is provided centralful in connection with screen doors which are 1y with atiny orifice 27. With this construc-, urged toward the door frame by springs. Other tion, the valve 26 permits a large intake of air specific objects and advantages will appear as the through the opening 18 as the stem 21 is with- 15'i specification proceeds. drawn but during thecompression stroke seats The invention is illustrated, in its preferred tightly against the opening 18 and permits the embodiment, in the accompanying drawings, in escape of air only through the tiny orifice 27. which-- Secured to the outer end of the stem 21 is a Fig. 1 is a view in elevation of apparatus emcatch plate or slotted head 28. The head may 20'bodying my invention and shown applied to a be secured to the stem 21in any suitable man- 76 door and door frame, the air tube being shown ner. In the illustration given, the head 28 is in longitudinal section and the section being provided with attachment lugsor ears 29 which taken as indicated at line 1 of Fig. 2; Fig. 2, a are clamped about a reduced portion 30 of the top plan view; Fig. 3, an enlarged sectional view, valve stem. As shown more clearly in Figs. 1

25ithe section being taken as indicated at line 3 of and 4, the catch plate, or head 28 is provided Fig. 1; Fig. 4, a broken view similar to Fig. 2 with a slot 31which tapers outwardly toward the but showing the door in partially open position; open 'end 32. Theouter end of the plate is Fig. 5, a transverse sectional view, the section be provided with a curved cam surface 33 adapted ing taken as indicated at line 5 of Fig. 2; Fig. to engage the roller15. Below the cam 32 and 30, 6, a detail sectional view, the section being taken extending forwardly thereof is alip extension 34 as indicated at i e6 an 7,at a adapted to engage the roller 15 and to guide Verse sectional view, the section being taken as it into the slot 31. It will be noted that the indicated at line '7 of Fig. 6. slot 31 is somewhat sector-shaped so as to per- In the illustration given, A designates a door mit the swinging" of the head about the stud or 35 frame provided with a door jamb A; and B desroller as the door moves toward or away from ignates a door hinged to the frame. The door these members. is ust ate as P v d w a Screen and In the operation of the device, with the door the door B is drawn towa d the fra e A by a in closed position, as shown in Fig. 1, when the tension spring 10. door is opened, the roller 15 engages the upper 40 In the use of the spec fic e bod me u jaw of the head and causes the valve stem 21 trated, the d J' b y e cu y a to be retracted. The outward swinging of the if desired, and a et 0 keeper 12 secured to door, as illustrated in Fig. 4, finally causes the the f a However, if desired, the keeper 12 stud to clear the upper point of the head and m y be secured directly to the iamb A. The leaves the stem 21 in fully withdrawn posi- 45 bracket 12 is provided with a horizontal flange tion. During this movement, the check valve 1110 13 to which is secured a pi AbOllt the p 26 permits the full intake of air into the chamis rotatably carried a roller 15. ber 17, the air on the upper side of the valve Secured to the door B is a bracket member 16 head 22 being expelled readily through the opencarrying a tube 17 which is integrally formed ing 19 When the door is closed, the lip ex- 501 therewith. The tube 17 is provided at its inner tension 34 is brought into contact with the stud end with an opening 18 and at its opposite open 14 and guides it into the slot 31. If desired, the end is threaded to receive cap 19. The cap 19 roller 15 may first contact with the cam surface is provided with an opening 19. The cap 19 is 32 and be guided thereby into the mouth of the preferably provided with an apertured boss 20 slot. The piston stem is then urged inwardly 551 adapted to receive and guide the valve stem 21. so as to force the piston head 22 toward the open- '19 ing 18. The pressure causes the piston head 26 to seat against the lower portion of the tube 1'7 and permits escape of air only through the tiny orifice 2'7. This action results in a cushioning of the stem and allows the door to come against the door jamb slowly and silently.

While the door check has been illustrated as providedwith a check valve, it will be understood that this may be dispensed with, if desired, and the tube 17 provided merely with a tiny orifice instead of the large orifice 18. Other changes in the details of construction may readily be made without-departing from the spirit of the invention.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

II claimz. Y i 1 H 1. In combination witha dooryand door frame, a stud supported by oneofsuch members in spaced relation thereto, a stationary support secured to the other member, a stem reciprocally guided in said support, means carried by said support for cushioning the rearward movement of said stem, and a head secured to the outer end portion of said stem and provided with a laterally extending slot, said slot having an open end adapted to receive said stud.

2. In combination with a door and door frame, a stud supported by one of said members in spaced relation thereto, a stationary support carried by the other member, a stem reciprocally guided therein and aligned with said stud, means for cushioning the rearward movement of said stem, and a head secured to the forward end of said stem and having a tapered laterally extending slot therein, said head being also provided with a lip extension on the inner side of said slot.

3. In combination with a door and door frame, supports carried by said'door and door frame, a stem reciprocally guided in one of said supports, means associated with said last mentioned support for cushioning the rearward movement of said stem, and releasable interlocking members carried by the other support and bythe free end of said stem, one of said interlocking members comprising a stud andthe other interlocking member comprising a head having a laterally extending slot, said slot having an open end adapted to receive said stud.

' i GUSTAV, A. CARLSON. 

